The figures (A - D) show four animals. Select the correct option with respect to a common characteristic of two of these animals.

Question

The figures (A - D) show four animals. Select the correct option with respect to a common characteristic of two of these animals. (A) (A) and (D) respire mainly through body wall (B) (B) and (C) show radial symmetry (C) (A) and (B) have cnidoblasts for self-defence (D) (C) and (D) have a true coelom.

Tardigrade Admin · Accepted Answer

The animals which possess true coelom are called eucoelomates or coelomates. The true coelom is a body cavity which arises as a cavity in embryonic mesoderm. True coelom is of two types; schizocoelom (schizocoel) and enterocoelom (enterocoel). Schizocoelom develops as a split in the mesoderm sheet. It is found in annelids, arthropods, molluscs. In enterocoelom, mesoderm arises from the wall of the embryonic cut of enteron as hollow outgrowths. It occurs in echinoderms and chordates.

Q. The figures (A - D) show four animals. Select the correct option with respect to a common characteristic of two of these animals.

(A) and (D) respire mainly through body wall

(B) and (C) show radial symmetry

(A) and (B) have cnidoblasts for self-defence

(C) and (D) have a true coelom.